In algebra, when we deal with points on a graph, you may be asked to find its domain and range. Let's learn what each of these mean.

The domain has to do with the values of x in your function. The domain tells us all the possible values of x (the independent variable) that will output real y-values. Two things to note is that in the function you're looking at, the denominator of a fraction can never be 0 and that if your function has a square root, it must be positive (for now).

When you're looking at range, you're now looking at the values of y. The range is all the possible resulting variables of the dependent variable (which is usually y in a function) after substituting in the domain, which we've learned is all the possible values of x.

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